Even if you had the option to open channels with other nodes, most people would still use ACINQ's nodes. So you would have to also make them migrate. Whether or not you can only open channels with ACINQ is irrelevant to the issue you underlined because the solution is the same anyway. Force close or just sent your funds to another wallet. I don't even think it's an issue. If you don't like what they're doing you have the keys. Bounce.